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Brandenburg K, Hamad G, Meisel Z, Brune CR, Carter DE, Derkin J, Ingram DC, Jones-Alberty Y, Kenady B, Massey TN, Saxena M, Soltesz D, Subedi SK, Warren J. Measurements of the 27Al(α, n) Thick Target Yield near Threshold. NUCL SCI ENG 2022. [DOI: 10.1080/00295639.2022.2118483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Affiliation(s)
- K. Brandenburg
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - G. Hamad
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - Z. Meisel
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - C. R. Brune
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. E. Carter
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - J. Derkin
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. C. Ingram
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - Y. Jones-Alberty
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - B. Kenady
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - T. N. Massey
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - M. Saxena
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - D. Soltesz
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - S. K. Subedi
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
| | - J. Warren
- Ohio University, Institute of Nuclear & Particle Physics, Department of Physics & Astronomy, Athens, Ohio 45701
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Bishop J, Parker CE, Rogachev GV, Ahn S, Koshchiy E, Brandenburg K, Brune CR, Charity RJ, Derkin J, Dronchi N, Hamad G, Jones-Alberty Y, Kokalova T, Massey TN, Meisel Z, Ohstrom EV, Paneru SN, Pollacco EC, Saxena M, Singh N, Smith R, Sobotka LG, Soltesz D, Subedi SK, Voinov AV, Warren J, Wheldon C. Neutron-upscattering enhancement of the triple-alpha process. Nat Commun 2022; 13:2151. [PMID: 35444209 PMCID: PMC9021293 DOI: 10.1038/s41467-022-29848-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 03/31/2022] [Indexed: 11/30/2022] Open
Abstract
The neutron inelastic scattering of carbon-12, populating the Hoyle state, is a reaction of interest for the triple-alpha process. The inverse process (neutron upscattering) can enhance the Hoyle state’s decay rate to the bound states of 12C, effectively increasing the overall triple-alpha reaction rate. The cross section of this reaction is impossible to measure experimentally but has been determined here at astrophysically-relevant energies using detailed balance. Using a highly-collimated monoenergetic beam, here we measure neutrons incident on the Texas Active Target Time Projection Chamber (TexAT TPC) filled with CO2 gas, we measure the 3α-particles (arising from the decay of the Hoyle state following inelastic scattering) and a cross section is extracted. Here we show the neutron-upscattering enhancement is observed to be much smaller than previously expected. The importance of the neutron-upscattering enhancement may therefore not be significant aside from in very particular astrophysical sites (e.g. neutron star mergers). The triple-alpha process plays a role in nucleosynthesis, in the formation of 12C. Here, the authors discuss the rate and role of the neutron upscattering phenomenon on the triple-alpha process in a multi-step process.
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Affiliation(s)
- J Bishop
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.
| | - C E Parker
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - G V Rogachev
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.,Department of Physics & Astronomy, Texas A&M University, College Station, TX, 77843, USA.,Nuclear Solutions Institute, Texas A&M University, College Station, TX, 77843, USA
| | - S Ahn
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA.,Center for Exotic Nuclear Studies, Institute for Basic Science (IBS), Daejeon, 34126, Republic of Korea
| | - E Koshchiy
- Cyclotron Institute, Texas A&M University, College Station, TX, 77843, USA
| | - K Brandenburg
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - C R Brune
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - R J Charity
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA
| | - J Derkin
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - N Dronchi
- Department of Physics, Washington University, St. Louis, MO, 63130, USA
| | - G Hamad
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Y Jones-Alberty
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Tz Kokalova
- School of Physics and Astronomy, University of Birmingham, Birmingham, UK
| | - T N Massey
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - Z Meisel
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - E V Ohstrom
- Department of Physics, Washington University, St. Louis, MO, 63130, USA
| | - S N Paneru
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - E C Pollacco
- IRFU, CEA, Université Paris-Saclay, Gif-Sur-Yvette, France
| | - M Saxena
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - N Singh
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - R Smith
- Department of Engineering and Mathematics, Sheffield Hallam University, Sheffield, S1 1WB, UK
| | - L G Sobotka
- Department of Chemistry, Washington University, St. Louis, MO, 63130, USA.,Department of Physics, Washington University, St. Louis, MO, 63130, USA.,McDonnell Center for the Space Sciences, Washington University, St. Louis, MO, 63130, USA
| | - D Soltesz
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - S K Subedi
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - A V Voinov
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - J Warren
- Edwards Accelerator Laboratory, Department of Physics & Astronomy, Ohio University, Athens, OH, 45701, USA
| | - C Wheldon
- School of Physics and Astronomy, University of Birmingham, Birmingham, UK
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Kornilov NV, Grimes SM, Massey TN, Brient CE, Carter DE, O’Donnell JE, Cooper KW, Carlson AD, Bateman FB, Heimbach CR, Boukharouba N. A High-Precision Tagged Neutron n-p Scattering Measurement at 14.9 MeV. NUCL SCI ENG 2020. [DOI: 10.1080/00295639.2019.1702408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- N. V. Kornilov
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - S. M. Grimes
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - T. N. Massey
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - C. E. Brient
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - D. E. Carter
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - J. E. O’Donnell
- Ohio University, Department of Physics and Astronomy, Athens, Ohio
| | - K. W. Cooper
- Lincoln Memorial University, Department of Chemistry and Physics, Harrogate, Tennessee
| | - A. D. Carlson
- National Institute of Standards and Technology, Gaithersburg, Maryland
| | - F. B. Bateman
- National Institute of Standards and Technology, Gaithersburg, Maryland
| | - C. R. Heimbach
- National Institute of Standards and Technology, Gaithersburg, Maryland
| | - N. Boukharouba
- University of Guelma, Department of Physics, Guelma, Algeria
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Yuly M, Eckert T, Hartshaw G, Padalino SJ, Polsin DN, Russ M, Simone AT, Brune CR, Massey TN, Parker CE, Fitzgerald R, Sangster TC, Regan SP. The 12C(n, 2n) 11C cross section from threshold to 26.5 MeV. Phys Rev C 2018; 97:024613. [PMID: 29732443 PMCID: PMC5930386 DOI: 10.1103/physrevc.97.024613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The 12C(n, 2n)11C cross section was measured from just below threshold to 26.5 MeV using the Pelletron accelerator at Ohio University. Monoenergetic neutrons, produced via the 3H(d,n)4He reaction, were allowed to strike targets of polyethylene and graphite. Activation of both targets was measured by counting positron annihilations resulting from the β+ decay of 11C. Annihilation gamma rays were detected, both in coincidence and singly, using back-to-back NaI detectors. The incident neutron flux was determined indirectly via 1H(n,p) protons elastically scattered from the polyethylene target. Previous measurements fall into upper and lower bands; the results of the present measurement are consistent with the upper band.
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Affiliation(s)
- M Yuly
- Department of Physics, Houghton College, Houghton, New York 14744, USA
| | - T Eckert
- Department of Physics, Houghton College, Houghton, New York 14744, USA
| | - G Hartshaw
- Department of Physics, Houghton College, Houghton, New York 14744, USA
| | - S J Padalino
- Department of Physics, State University of New York, Geneseo, New York 14454, USA
| | - D N Polsin
- Department of Physics, State University of New York, Geneseo, New York 14454, USA
| | - M Russ
- Department of Physics, State University of New York, Geneseo, New York 14454, USA
| | - A T Simone
- Department of Physics, State University of New York, Geneseo, New York 14454, USA
| | - C R Brune
- Edwards Accelerator Laboratory, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - T N Massey
- Edwards Accelerator Laboratory, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - C E Parker
- Edwards Accelerator Laboratory, Department of Physics and Astronomy, Ohio University, Athens, Ohio 45701, USA
| | - R Fitzgerald
- National Institute of Standards and Technology, 100 Bureau Drive, Stop 8462, Gaithersburg, Maryland 20899-8462, USA
| | - T C Sangster
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
| | - S P Regan
- Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623, USA
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Howard WB, Grimes SM, Massey TN, Al-Quraishi SI, Jacobs DK, Brient CE, Yanch JC. Measurement of the Thick-Target9Be(p,n) Neutron Energy Spectra. NUCL SCI ENG 2017. [DOI: 10.13182/nse01-a2206] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- W. B. Howard
- Massachusetts Institute of Technology, Department of Physics, Cambridge, Massachusetts 02139
| | - S. M. Grimes
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - T. N. Massey
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - S. I. Al-Quraishi
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - D. K. Jacobs
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - C. E. Brient
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - J. C. Yanch
- Massachusetts Institute of Technology, Department of Nuclear Engineering and Whitaker College of Health Sciences and Technology, Cambridge, Massachusetts 02139
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Massey TN, Al-Quraishi S, Brient CE, Guillemette JF, Grimes SM, Jacobs D, O’Donnell JE, Oldendick J, Wheeler R. A Measurement of the27Al (d, n) Spectrum for Use in Neutron Detector Calibration. NUCL SCI ENG 2017. [DOI: 10.13182/nse98-a1971] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | | | | | | | | | - D. Jacobs
- Ohio University, Athens, Ohio 45701-2979
| | | | | | - R. Wheeler
- Ohio University, Athens, Ohio 45701-2979
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Lullo ARD, Massey TN, Grimes SM, Carter DE, O’Donnell JE, Jacobs D. A Fission Chamber Measurement of thenatB(d,n) Cross Section for Use in Neutron Detector Calibration. NUCL SCI ENG 2017. [DOI: 10.13182/nse159-346tn] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- A. R. Di Lullo
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - T. N. Massey
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - S. M. Grimes
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - D. E. Carter
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - J. E. O’Donnell
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
| | - D. Jacobs
- Ohio University, Department of Physics and Astronomy, Athens, Ohio 45701
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Sayre DB, Brune CR, Carter DE, Jacobs DK, Massey TN, O'Donnell JE. E2 interference effects in the 12C(α,γ0)16O reaction. Phys Rev Lett 2012; 109:142501. [PMID: 23083238 DOI: 10.1103/physrevlett.109.142501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2012] [Indexed: 06/01/2023]
Abstract
The E1-E2 interference sign between the E(c.m.)=2.68-MeV E2 resonance and an underlying E1 strength has been measured for the first time. An E1-E2 asymmetry parameter of a=0.07±0.05 was extracted from the thick-target γ-ray yields of the narrow resonance at angles of 45° and 135°. The positive sign of a corresponded to constructive interference at forward angles and, further, allowed the interference between the resonance and an E2 background to be identified as constructive below the resonance energy. The E2-E2 interference was then used to evaluate the global S(E2) data within the vicinity of the resonance 2.5≤E(c.m.)≤3.0 MeV. An analysis of the global S(E2) data that agreed with the interference scenario has determined the E2-E2 interference scheme of the 4.34-MeV resonance and background, resulting in a value of S(E2)(300)=62(-6)(+9) keV b.
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Affiliation(s)
- D B Sayre
- Ohio University, Athens, Ohio 45701, USA.
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Howard WB, Yanch JC, Grimes SM, Massey TN, al-Quraishi SI, Jacobs DK, Brient CE. Measurement of the 9Be(p,n) thick target spectrum for use in accelerator-based boron neutron capture therapy. Med Phys 1996; 23:1233-5. [PMID: 8839418 DOI: 10.1118/1.597684] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- W B Howard
- Department of Physics, Massachusetts Institute of Technology, Cambridge 02139, USA
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Bohlen HG, Kalpakchieva R, Aleksandrov DV, Gebauer B, Grimes SM, Kirchner T, von Lucke-Petsch M, Massey TN, Mukha I, von Oertzen W, Ogloblin AA, Ostrowski AN, Seyfert C, Stolla T, Wilpert M, Wilpert T. Spectroscopy of excited states of11Li. ACTA ACUST UNITED AC 1995. [DOI: 10.1007/bf01292778] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Massey TN, Downs PE. Benign recurrent jaundice of pregnancy. N C Med J 1968; 29:161-3. [PMID: 5240671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Massey TN. Pulmonary embolism. Review of fifty autopsy cases in which pulmonary embolism was the cause or a major contributing cause of death. N C Med J 1966; 27:63-6. [PMID: 5217040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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